SupplementsStrong evidenceDoctor approved
Vitamin D
Vitamins
Adequate vitamin D status is associated with better outcomes in several cancers and supports immune regulation.
- Low vitamin D linked to higher cancer incidence.
- Supports bone health during treatment.
- Helps regulate cell growth.
Dosing should be based on a blood test. Take with a fatty meal for absorption.
Excess vitamin D causes toxicity (high calcium). Always confirm dose with your care team.
Learn more from trusted sources
- American Cancer Society — NutritionEating well during and after cancer treatment.
- American Institute for Cancer Research (AICR)Evidence-based cancer-prevention diet and lifestyle guidance.
- National Cancer Institute — NutritionNutrition in cancer care (U.S. NIH).
- World Cancer Research Fund (WCRF)Global research on diet, activity and cancer.
- Cancer Research UK — Diet & CancerManaging diet and eating problems during treatment.
This information is educational and may support wellbeing — it is not medical advice and never a promise of a cure. Always consult your oncology care team before changing diet, supplements, or medication.